John blake take



JOHN' BLAKE TARE; or c.HIcaeo,.ILLrNoIs vLetters Patent No. 82,450,dated September 22, 1868; antedateol- September 16, 1868.

IMPROVEMENT IN GARIENTBRS PLANES.

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TO ALL WHOM IT MAY CONCERN:

Be itl known that I, JOHN BLAKE TAiiR, of Chicago, Cook county,AState ofIllinois, have'invented an 'i Improved Carpenters Plan-e; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making part of this specification, iu which- Figure I is a longitudinalsection,'taken vertically through the centre of my improved plane.

Figure 2 is a similar view`ot` the same'parts, showing the plane-ironset to cut a. very thick shaving.

Figure is a perspective view ofthe plane complete.

Similar letters of'reference indicate corresponding parts in the severalfigures.

l,This invention relates Vto an improvement in adjusting and settingplane-irons of' carpenters or'benchplanes, of various descriptions,whereby these irons or blades can be adjusted and set atiany desiredpitch fo'r removing very thin or very thick shavings, by simply turninga thumb-screw, which is applied to the planestock and blade in suchmanner as to give a greater or less bow or bend to the latter, accordingtothe pitch required, as will be 'hereinafter described.

Before my invention, plane-irons have been applied to plane-stocks bymeans of clamping-devices, which bent or bowed the irons, so as toincrease or diminish the pitch of their cutting-edges for removing thickor thin shavings. The objection to said devices is', that it isnecessary to rcnder the,plane-irons comparatively loose in adjustingtheir cutting-edges for removing thick shavings.k The object of mylinvention is, to so construct and apply adjusting-clamps to plane-ironsand' their stocks, that the greater the amount of pitch given to thecutting-edgesoil the irons, the tighter will they be held, as will behereinafter described. l

To enable others skilled in the art to understand my invention, I willdescribe its construction' and operation.

In the accompanying drawings r A represents the stock of ajointing-plane, having my invention.apphedio it. This stock isconstructed inthe usual well-known manner, and is also in the blade orplane-iron B, as will be seen by'reference to figs. I and 2. h

Near the upper termination of the inclined bed a of the plane-stock, arecess is made, into which is fitted and irinly secured a plate, Z1,having a, deep notch or slot formed in it, which should be exactly inthecent-re of the widthof the stock.

In rear of this slotted plate b, and in a line therewith, a hole isbored into the plane-stock, and screwtapped for receiving a malescrew,C, which has a. T-head formed upon its upper end. A similar-T-hcad'screw, D,ris tapped into the plane-stock in front of the slottedplate ZJ. Both screws, C and D, are in the same vertical plane, and bothhave the same degree of inclination backward, as shown in igs. I and 2.The screw C projects from the top of the plane-stock, and the screw I)projects from the inclined bed Atof this stock. They are arranged aboutequal distances from the slottcdplate I), and may be adjusted `furtherinto or out of the stock at pleasure, by turning them to the right orleft.

A thumb-screw, E, is tapped through a sliding nut, F, applied to theplane-iron B, which screw has an annular groove formed in it near thatend which' is opposite its head. This groove leaves a contracted neck,which is received by the groovcvor notch in the upper edge of xed plateb, as shown in figs. I and 2, thus. adording a purchase for the screw E,when applied in its place.

The n-ut F has grooves in its` sides, at right angles to the axis of thescrew E, which grooves receive the inner edges of theAplane-iron B, whenthe nut is applied in the slot thereof, and thus alford an attachmentfor the nut to the plane-iron. i i

i'he heads'on the screws C and D are turned so as to bring them in linewith the length of the slot through the plane-iron. l

The nut'F, with screw E applied t'o it, is slipped upon the plane-iron,and the latter adjusted in place in the plane, so that the neck of thescrew E will be received by the'slot or notch ou plate b, and the screwsC DV passed through the plane-iron slot, as shown in the drawings. Thescrews C and D arc then turned around so as to leave their headscross-wise of the slot through the plane-iron, thereby causing them toserve as bearings against which the'plane'iron is pressed upward, bytightening the screw E.

It will be seen, from the above description, that the planedron isforced upward and forward against the lower edges of the heads of screwsD, by means of an ad'justing-screw, which is between said screws;consequently the degree of inclination'ot` said plane-iron will begoverned by the relative positions of the heads of said screws C D,which latter can be adjusted at pleasure, when the plane-iron isreleased from pressure.

It will also be seenA that by setting the screw E up tight, theplane-iron will be more or less curved or bent out of a straight line,as shown in g. 2, the result of which will be to throw back thecutting-edge of said iron and increase or diminish its pitch, and thesize of the throat. A:By this arrangement, a very nice adjustment can beedected by simply turning the thumb-screw E, while, at the same time,the greater the pitch attained, the stronger .will the plane-iren beheld in place.

To remove the plane-iron for sharpeningrit, it is only necessary toloosen the screw E, and turn. the heads of the screws C D in line withthe slot through the plane-iron, when the latter may be slipped ont ofits place, and the screw E and its nut detached from it.

I do not claim, broadly, adjusting the cutting-edges of plane-irons bypressure applied between the upper and lower enclsof the iron; but A VWhat I do claim as my invention, and desire to secure by Letters Patent,is-

l. The' combination of the central clamping and tightening-device withthe adjustable supports C D, the said device and the supports beingapplied to a plane-stock, andin the relation to the plane-iron thereof,substantially as and for the purpose herein described.

2. Making the two supports or abutments C D adjustable, substantially asand for the purpose herein described.

3. Applying'pressure to a plane-iron between two supports, C D, througha device, E F, substantially in the manner and for the purpose hereindescribed.

4. Changingthe pitch` and tightening the plane-iron by the same means,and at the same time, the means Vemployed being constructed and operatedsubstantially as herein described.

5. The adjusting of the plane-iron by means of the clamping-devicecomposed of the screws C, D, and E, nut F, and plate b, and applied insuch manner that the bit'is tightened, and the pitch 'changed at thesame time, and by the saine means, when constructed to operatesubstantially in the manner described.

6. Arranging the plane-iron beneath the heads or shoulders of twoadjustable bearings, C D, and under n.' shoulder of a nut, F, so that itmaybe adjusted-by means of'either or both ofthe bearings C* D, and maybe tightened and have its pitch changed by the screw E, allsubstantiallyin the manner and for thepurpose described.

JOHN BLAKE TARE.

Witnesses.:

EDw. SCHAFER, Een. F. BROWN.

